definition helix
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helix helix (plural helixes or helices) (mathematics) A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase. (architecture) A small volute under the abacus of a Corinthian capital.
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II. Basic Elements Of Protein Structure An α-helix is almost invariably made up of a single, connected stretch of backbone (as opposed, for instance, to the backbone changeovers seen for double-helix in transfer RNAs: Holbrook et al., 1978). Almost the only known exception to this rule is the interrupted helix from subtilisin that is shown in Fig.
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double helix Definition of double helix. : a helix or spiral consisting of two strands in the surface of a cylinder that coil around its axis; especially : the structural arrangement of DNA in space that consists of paired polynucleotide strands stabilized by cross-links between purine and pyrimidine bases — compare alpha-helix, watson-crick model.
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Structure of the Double Helix Structure of the Double Helix. Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups.
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double helix The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together.Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.he double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together.
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Hedera helix Hedera helix is an evergreen climbing plant, growing to 20–30 m (66–98 ft) high where suitable surfaces (trees, cliffs, walls) are available, and also growing as groundcover where no vertical surfaces occur.It climbs by means of aerial rootlets with matted pads which cling strongly to the substrate.edera helix is an evergreen climbing plant, growing to 20–30 m (66–98 ft) high where suitable surfaces (trees, cliffs, walls) are available, and also growing as groundcover where no vertical surfaces occur.
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LAMA3 gene Laminin 332 is a major component of fibers called anchoring filaments, which connect the two layers of the basement membrane and help hold the skin together. Studies suggest that laminin 332 also has several other functions. This protein appears to be important in the formation of early wound-healing tissues. Additionally, researchers have proposed roles for laminin 332 in the clear outer covering of the eye (the cornea) and in the development of tooth enamel.
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Medical Definition of Double helix Double helix: The structure of DNA, in which two strands of DNA spiral about each other.
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Understanding the Double Helix Structure of DNA 1 In biology, double helix is a term used to describe the structure of DNA. A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of spiral staircase. DNA is a nucleic acid composed of nitrogenous bases (adenine, cytosine, guanine and thymine), a five-carbon sugar (deoxyribose), and phosphate molecules.
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Structure of the Double Helix Structure of the Double Helix Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G), or thymine (T).
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- noun (plural helices ˈhiːlɪsiːzˈhɛlɪsiːz). 1 An object having a three-dimensional shape like that of a wire wound uniformly in a single layer around a cylinder or cone, as in a corkscrew or spiral staircase.
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Helix  (TV series) Helix (TV series) Helix is an American science fiction thriller drama television series that aired on Syfy from January 10, 2014 to April 10, 2015. The series followed a team of scientists from the Centers for Disease Control and Prevention who traveled to a research facility in the Arctic to investigate a potential outbreak of disease.
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Alpha helix The alpha helix (α-helix) is a common secondary structure of proteins and is a righthand-coiled or spiral conformation (helix) in which every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier (hydrogen bonding).ide view of an α-helix of alanine residues in atomic detail. Two hydrogen FOR the same peptide group are highlighted in magenta; the H to O distance is about 2 A (å.0 20). Nm the protein chain runs upward; here that, is Its-n terminus is at the bottom and Its-c terminus at the. top
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- helix noun [ C ] (SHAPE) › specialized mathematics a curve that goes around a central tube or cone shape in the form of a spiral. Thesaurus: synonyms and related words. Geometry: bends, loops & curves. anfractuous.
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Understanding the Double Helix Structure of DNA Double Helix. Definition: In biology, double helix is a term used to describe the structure of DNA. A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of spiral staircase. DNA is a nucleic acid composed of nitrogenous bases (adenine, cytosine, guanine and thymine), a five-carbon sugar (deoxyribose), and phosphate molecules.
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Stainless steel The Helix Bridge is a pedestrian bridge linking Marina Centre with Marina South in the Marina Bay area in Singapore. 1  Cala Galdana Bridge in Minorca (Spain) was the first stainless steel road bridge. 2  Sant Fruitos Pedestrian Bridge (Catalonia, Spain), arch pedestrian bridge.
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Definition of 'helix' Used Occasionally. helix is one of the 30000 most commonly used words in the Collins dictionary
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Archimedes' screw The design of the everyday Greek and Roman water screw, in contrast to the heavy bronze device of Sennacherib, with its problematic drive chains, has a powerful simplicity. A double or triple helix was built of wood strips (or occasionally bronze sheeting) around a heavy wooden pole.
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Definitions &Translations A helix (pl: helixes or helices) is a type of smooth space curve, i.e. a curve in three-dimensional space. It has the property that the tangent line at any point makes a constant angle with a fixed line called the axis. Examples of helices are coil springs and the handrails of spiral staircases.
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Helix Bridge The Helix Bridge, previously known as the Double Helix Bridge, is a pedestrian bridge linking Marina Centre with Marina South in the Marina Bay area in Singapore. It was officially opened on 24 April 2010 at 9 pm, however only half was opened due to ongoing construction at the Marina Bay Sands.he 280 m bridge is made up of three 65 m spans and two 45 m end spans. If the steel were stretched out straight from end to end, it would measure 2.25 km in length.
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- The two strands of the double helix are anti-parallel, which means that they run in opposite directions. The sugar-phosphate backbone is on the outside of the helix, and the bases are on the inside. The backbone can be thought of as the sides of a ladder, whereas the bases in the middle form the rungs of the ladder.
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Understanding the Double Helix Structure of DNA Double Helix. Definition: In biology, double helix is a term used to describe the structure of DNA. A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of spiral staircase.
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Bioinformatics: Concepts, Methods, and Data Alpha Helices. The alpha helix is a rod-like structure whose inner section is formed by a tightly coiled main chain, with its side chains extending outward in a helical array. The alpha helix structure takes advantage of the hydrogen bond between CO and NH groups of the main chain to stabilize. The CO group of each amino acid forms a hydrogen bond with the NH group of amino acid four residues earlier in the sequence.
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- Mount Rushmore National Memorial, a unit of the National Park System, is located 25 miles southwest of Rapid City, SD via U.S. 16. Click here for the National Register of Historic Places file: text and photos.
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spiral staircase Word by Word Definitions. spiralplay. : winding around a center or pole and gradually receding from or approaching it. : helical. : spiral-bound. : the path of a point in a plane moving around a central point while continuously receding from or approaching it. : a three-dimensional curve (as a helix) with one or more turns about an axis.
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How to Care for a Helix or Forward Helix Piercing XVampireX more. This article discusses helix and forward helix ear piercings. A helix piercing is most commonly called the top ear piercing or the ear cartilage, and the forward helix is the small piece of skin at the very front of the helix that attaches the ear and the temple together. The forward helix is also a cartilage piercing—you can see images of this below.